void setup() {
 pinMode(2,OUTPUT);
 pinMode(3,OUTPUT);
 pinMode(4,OUTPUT);
 pinMode(5,OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly: 
 digitalWrite(2,HIGH);
 digitalWrite(4,HIGH);
 analogWrite(3,128);
 analogWrite(5,128);
 delay(3000);
 digitalWrite(2,LOW);
 digitalWrite(4,LOW);
 analogWrite(3,255);
 analogWrite(5,255);
 delay(3000);
 analogWrite(3,0);
 analogWrite(5,0);
 delay(3000);
}
